Improvement in the manufacture of indelible writing-ink



UNITED STATES PATENT OFFICE.

THOMAS J. SPEAR, OF NEV ORLEANS, LOUISIANA.

IMPROVEMENT IN THE MANUFACTURE OF lNDELlBLE WRlTlNG-INK.

Specification forming part of Letters Patent No. 2,176, dated July 16, 1841.

To all whom it may concern: mixture well for about ten minutes, when the Be it known that I, THOMAS J. SPEAK, of indelible writing-ink is produced.

the city of New Orleans, parish of Orleans, What I claim as my discovery, and which I and State of Louisiana, have discovered a new desire to secure by Letters Patent, is-

and useful Method of Making Indelible Writ- The beforedescribed indelible writing-ink.

lug-Ink which is described as follows: q

To m ake four ounces of indelible writing- SPEAK ink, take three drams of the best bruised india- Witnesses:

ink and four ounces of boiling solution of caus- WM. P. ELLIOT,

tic soda and mix these together and shake the W. E. GRUNWELL. 

